79 Ceti
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 02h 35m 19.93s[1] |
| Declination | −03° 33′ 38.2″[1] |
| Apparent magnitude (V) | +6.78 |
| Characteristics | |
| Spectral type | G5IV |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | -53 km/s |
| Proper motion (μ) | RA: -157.31 ± 0.49[1] mas/yr Dec.: -438.79 ± 0.43[1] mas/yr |
| Parallax (π) | 25.67 ± 0.66[1] mas |
| Distance | 127 ± 3 ly (39 ± 1 pc) |
| Absolute magnitude (MV) | 4.00 |
| Details | |
| Mass | 1.14[2] M☉ |
| Radius | 1.57 R☉ |
| Luminosity | 2.16 L☉ |
| Temperature | 5,806[2] K |
| Metallicity | [Fe/H] = 0.16[2] 1.45 × Solar |
| Age | 6.0[2] Gyr |
| Other designations | |
HD 16141, GJ 9085, HIP 12048 | |
79 Ceti (also known as HD 16141) is a yellow subgiant star approximately 127 light-years[1] away in the constellation Cetus. It has stopped hydrogen fusion in its core, this implies an age much higher than our Sun's 4.5 billion years. Eventually the outer layers of the star will expand and cool and the star will become a red giant. Currently 79 Ceti has a luminosity twice that of the Sun.
Planetary system
In 2000, a planet of the star was discovered.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥0.260 ± 0.028 MJ | 0.363 ± 0.021 | 75.523 ± 0.055 | 0.252 ± 0.052 | — | — |
See also
References
- 1 2 3 4 5 6 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- 1 2 3 4 Sousa, S. G.; Fernandes, J.; Israelian, G.; Santos, N. C. (March 2010). "Higher depletion of lithium in planet host stars: no age and mass effect". Astronomy and Astrophysics 512: L5. arXiv:1003.0405. Bibcode:2010A&A...512L...5S. doi:10.1051/0004-6361/201014125.
- ↑ Marcy, Geoffrey W.; et al. (2000). "Sub-Saturn Planetary Candidates of HD 16141 and HD 46375". The Astrophysical Journal Letters 536 (1): L43–L46. arXiv:astro-ph/0004326. Bibcode:2000ApJ...536L..43M. doi:10.1086/312723.
- ↑ Butler, J. T.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
External links
- SIMBAD: HD 16141 -- High proper-motion Star
- SolStation: 79 Ceti
- Extrasolar Planets Encyclopaedia: HD 16141
Coordinates: 
02h 35m 19.9283s, −03° 33′ 38.167″
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